CN100442708C - A method and system for active/standby backup - Google Patents

Abstract

The present invention relates to a method for master to standby backup, which comprises the steps that data which needs to be compressed is selected in data which needs to be in backup for a master system; the data which needs to be compressed is compressed so that compressed data is obtained, and the data which needs to be in backup and comprises the compressed data is sent to a standby system; the standby system receives the data from the master system and decompresses the compressed data so as to obtain decompressed data, and thus, the data which needs to be in backup and contains the decompressed data is saved. The present invention also discloses a system for the master to standby backup. Therefore, the invention can greatly reduce the flux of the backup data and further reduce the system resource occupation of the data backup.

Description

A method and system for active/standby backup

technical field

The invention relates to the technical field of active-standby backup switchover of network elements in a communication system, in particular to a method and system for active-standby backup.

Background technique

In a communication system, when a service is established, maintained and released, huge data will be generated in the corresponding network element. Usually, a network element has a main system and a backup system. During normal operation, only the main system works externally, and at the same time, relevant business data is backed up to the backup system, so as to ensure the communication between the backup system and the main system. data synchronization. When active-standby switchover is required, for example, when the active system fails or the switchover is artificially set, the business can be switched to the standby system without affecting the current business.

At present, the backup technology of network elements in the communication system usually adopts a direct backup method, that is, the primary system does not make any changes to the data that needs to be backed up, and directly backs it up to the backup system through the underlying transmission interface.

Since the data that needs to be backed up by a single business is relatively large, when there are multiple businesses in the system, the total data that needs to be backed up by all businesses will be very large. Backing up such a huge amount of data directly to the backup system will generate a very large amount of data traffic, and the transmission and processing of such a large amount of data traffic will occupy a large amount of system resources, which will have a certain impact on the normal business processing of the system. And when the data traffic is too large to exceed or equal to the bandwidth of the underlying transmission interface, it may cause congestion. When the congestion exceeds the buffer limit, data will be lost, causing the problem of incomplete backup.

Contents of the invention

In view of this, the object of the present invention is to propose a method and system for master backup backup that reduces the backup data flow between master and backup systems.

According to above-mentioned purpose, the present invention proposes a kind of method of primary and secondary backup, and this method comprises the following steps:

A. According to the data type, select the data that adopts the network layer data structure formulated according to the standard interface from the data that needs to be backed up by the main system;

B. Compressing the data that adopts the network layer data structure formulated according to the standard interface to obtain compressed data, and sending the data that needs to be backed up that includes the compressed data to the backup system;

C. After receiving the data sent by the primary system, the standby system decompresses the compressed data to obtain the decompressed data, and saves the data that needs to be backed up including the decompressed data.

In the above technical solution, the data in step A using the network layer data structure formulated according to the standard interface is part or all of the data to be backed up.

In step B, compression is performed by the compression method of the active system itself; and/or in step C, decompression is performed by the decompression method of the backup system itself.

The main system and the backup system are the main system and the backup system on the wideband code division multiple access WCDMA radio network controller RNC.

In the step B, encoding and compression is carried out by abstract syntax rule-ASN.1;

In the step C, decoding and decompression is performed through ASN.1.

The present invention also proposes an active/standby backup system, the system includes an active system and a backup system, the active system includes an active system backup module and an underlying transmission interface of the active system; the active system backup module is used for From the data that needs to be backed up, select the data using the network layer data structure formulated according to the standard interface, compress the data using the network layer data structure formulated according to the standard interface to obtain compressed data, and include the compressed data The data that needs to be backed up after the data is sent to the standby system through the bottom transmission interface of the main system;

The backup system includes a backup system backup module and a bottom layer transmission interface of the backup system; the backup system backup module is used to identify and decompress the compressed data after receiving the data sent by the main system through the bottom layer transmission interface of the backup system. The data obtains the decompressed data, and saves the data that needs to be backed up including the decompressed data.

The main system backup module includes a first data identification module and a compression module; the backup system backup module includes a second data identification module and a decompression module; wherein, the first data identification module is used to When the data of the network layer data structure formulated by the standard interface is part of the data that needs to be backed up, the data that adopts the network layer data structure formulated according to the standard interface is selected from the data that needs to be backed up, and sent to the compression module, and the The uncompressed data in the data to be backed up is sent to the backup system through the underlying transmission interface of the active system; or used when the data using the network layer data structure formulated according to the standard interface is all the data to be backed up , selecting the data using the network layer data structure formulated according to the standard interface from the data to be backed up, and sending it to the compression module;

The compression module is used to compress the compressed data obtained by using the data of the network layer data structure formulated according to the standard interface, and send the compressed data to the standby system through the bottom transmission interface of the primary system;

The second data identification module is configured to receive the data sent by the active system through the underlying transmission interface of the standby system when the data using the network layer data structure formulated according to the standard interface is part of the data that needs to be backed up. , identifying the compressed data and sending it to the decompression module, and saving the uncompressed data; or when the data using the network layer data structure formulated according to the standard interface is all the data that needs to be backed up , after receiving the data sent by the main system through the bottom layer transmission interface of the backup system, identifying the compressed data and sending it to the decompression module;

The decompression module is used for decompressing the compressed data and saving the decompressed data.

The compression module is a compression function module of the active system itself; and/or the decompression module is a decompression function module of the standby system itself.

The main system and the backup system are the main system and the backup system on the WCDMA RNC.

The compression module is an ASN.1 codec function module; and/or the decompression module is an ASN.1 codec function module.

As can be seen from the above scheme, since the present invention selects the data to be compressed from the ones that need to be backed up by the primary system, and sends it to the standby system for backup after being compressed, the traffic of the backup data is reduced to a large extent, and the It reduces the occupation of system resources by data backup. And in the preferred embodiment of the present invention, the encoding and decoding function modules of the main system and the backup system are used for compression and decompression, which minimizes the transformation of the existing system and has the characteristics of convenient and simple implementation. It is beneficial to popularize and use on a large scale.

Description of drawings

Fig. 1 is the system structural representation of the present invention in WCDMA RNC;

Fig. 2 is a schematic flow chart of the method of the present invention.

Detailed ways

In order to make the purpose, technical solution and advantages of the present invention clearer, the following examples are given to further describe the present invention in detail.

Different from the prior art, the present invention firstly compresses the data, and then transmits the compressed data to the backup system, and the backup system decompresses the compressed data and saves them. Since compressing all the data that needs to be backed up will take up a lot of system resources, the present invention further proposes to compress the data with high energy efficiency ratio in addition to selecting all the data that needs to be backed up to be compressed.

The present invention is applicable to all network elements adopting active-standby switching mode in the communication system. For the convenience of description, the radio network controller (RNC) network element in the wideband code division multiple access (WCDMA) system is taken as an example below.

FIG. 1 is a schematic diagram of the system structure of this embodiment. The system includes a main system and a backup system. The main system includes a backup module of the main system and a bottom transmission interface of the main system. The backup system includes a backup module of the backup system and a bottom transmission interface of the backup system. The main system backup module is used to select the data that needs to be compressed from the data that needs to be backed up, compress the data that needs to be compressed to obtain compressed data, and pass the data that needs to be backed up including the compressed data through the The underlying transmission interface of the active system is sent to the backup system, and the backup module of the active system includes a first data identification module and a compression module. Wherein the first data identification module is used to select the data that needs to be compressed from the data that needs to be backed up, and then sends the data that needs to be compressed to the compression module for processing, if the data that needs to be compressed is a part of the data that needs to be backed up, the first data identification The module also sends the data that does not need to be compressed to the backup system through the bottom transmission interface of the main system; the compression module compresses the data that needs to be compressed, and then sends the compressed data to the backup system through the bottom transmission interface of the main system; The standby system backup module is used to identify and decompress the compressed data to obtain the decompressed data after receiving the data sent by the main system through the underlying transmission interface of the standby system, and save the required backup containing the decompressed data data, the backup system backup module includes a second data identification module and a decompression module. The second data identification module receives the data sent by the main system from the bottom transmission interface of the backup system, and transfers the compressed data to the decompression module for processing. The compressed data is directly saved in the memory of the backup system; the decompression module decompresses the compressed data, and then saves the decompressed data to the memory of the backup system; It is used to transfer data between the active system and the standby system.

For the compression module and decompression, it can be a newly added module in the system, which is used to compress the data that needs to be compressed, but adding a new module will increase the load of the system, and the system will be greatly changed. Since the network element generally has a codec function module, the present invention proposes to use the codec function module of the system itself as a compression module to avoid increasing the system load. Using the encoding and decoding function module of the system itself as the compression module can minimize the modification of the system, making the implementation process of the present invention very simple.

Fig. 2 is a schematic flow chart of this embodiment.

Investigate the data that needs to be backed up on the RNC, most of which belong to the data of the network layer. Only a small part of the data of the network layer adopts a self-defined data structure, and most of the data directly adopts the WCDMA RNC system according to various standards. The interface specifies the network layer data structure. For the convenience of description, the data that needs to be backed up that does not belong to the call service data on the network layer is called data A, and the backup data related to the call service that belongs to the network layer and uses a custom data structure is called data B. The backup data related to the call service that belongs to the network layer and uses the network layer data structure formulated according to each standard interface is called data C. In the network element RNC, the system itself can distinguish and identify the above-mentioned data A, data B, and data C according to the data type of the data. The data type of the data is the existing content, and it points out that the data is specifically data A, data B, and data C. or other data, and also indicate the length of the data. If all the data that needs to be backed up are encoded and compressed, it will take up a lot of system resources, and considering the energy efficiency ratio of compression, the compression effect of some of the data is not obvious. Therefore, in this embodiment, the data C is selected to be compressed, and the data C is coded and compressed using the Abstract Syntax Notation Number One (ASN.1) codec function module included in the WCDMA RNC. The ASN.1 codec function module used in WCDMA RNC provides a compression and decompression algorithm for the network layer data structure formulated according to the standard interface, and the compression efficiency is relatively high. In this embodiment, the above data C is compressed by the ASN.1 codec function module on the RNC.

Referring to Fig. 2, the flow process of this embodiment includes the following steps:

From step 201 to step 202, the first data identification module identifies data A, data B, and data C, selects data C among them as the data that needs to be compressed and sends it to the compression module, and passes data A and data B that do not need to be compressed through the main system The underlying transport interface is sent to the backup system. The compression module compresses the data C, and then sends the compressed data C to the backup system through the underlying transmission interface.

From step 203 to step 204, after the second data identification module of the backup system receives the backup data from the bottom transmission interface of the backup system, it first distinguishes data A, data B, and data C after ASN.1 encoding and compression according to the data type . The data A and data B are directly stored in the memory of the standby system; the data C compressed by ASN.1 encoding is sent to the decompression module, and the decompression module decompresses the original data C and then saves it to the memory middle. Similar to the main system, the decompression module of the backup system here is the ASN.1 codec function module that comes with the system.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of the present invention. within the scope of protection.

Claims (10)

1, a kind of method of active/standby backup is characterized in that, this method may further comprise the steps:

A. according to data type, need to select the backed up data data of employing with system according to the network layer data structure of standard interface formulation from main;

B. the data of the network layer data structure that described employing is formulated according to standard interface are compressed the data after obtaining compressing, and the backed up data that needs that will comprise the data after the described compression sends to back-up system;

C. back-up system receive main send data with system after, the data after the described compression are decompressed obtains data behind the decompress(ion), and preserves the backed up data that needs of the data that comprise after the decompression.

2, method according to claim 1 is characterized in that, the data that adopt the network layer data structure of formulating according to standard interface described in the steps A are the part or all of of described needs backed up data.

3, method according to claim 1 is characterized in that, compresses by the main compression method that has with system itself among the step B; And/or

The decompression method that has by back-up system itself among the step C decompresses.

4, method according to claim 1 is characterized in that, described master is leading with system, back-up system on the Wideband Code Division Multiple Access (WCDMA) WCDMA radio network controller (RNC) with system, back-up system.

5, method according to claim 4 is characterized in that, carries out encoding compression by abstract syntax rule one ASN.1 among the described step B;

Among the described step C by the ASN.1 decompression of decoding.

6, a kind of active/standby backup system, this system comprise and mainly it is characterized in that with system, back-up system,

Described master comprises main with system backup module and the main system bottom coffret of using with system; Described master is used for from needing backed up data to select the data of employing according to the network layer data structure of standard interface formulation with the system backup module, the data of the network layer data structure that described employing is formulated according to standard interface are compressed the data after obtaining compressing, and will comprise that the backed up data that needs of data after the described compression mainly sends to back-up system with the system bottom coffret by described;

Described back-up system comprises back-up system backup module and back-up system bottom coffret; Described back-up system backup module is used for after receiving main data of sending with system by back-up system bottom coffret, data after the identification and the described compression that decompresses obtain the data behind the decompress(ion), and preserve the backed up data that needs of the data that comprise after the decompression.

7, system according to claim 6 is characterized in that, described master comprises first data identification module and compression module with the system backup module; Described back-up system backup module comprises second data identification module and decompression module;

Wherein, described first data identification module, when the data that are used for the network layer data structure formulated according to standard interface when described employing are the part of needs backed up data, from need backed up data, select the data of described employing according to the network layer data structure of standard interface formulation, and send to compression module, and will need not have in the backed up data compressed data to send to back-up system with the system bottom coffret by described master; When the data that perhaps are used for the network layer data structure formulated according to standard interface when described employing are needs backed up data whole, from need backed up data, select the data of described employing, and send to compression module according to the network layer data structure of standard interface formulation;

Described compression module, the data after the data that are used to compress the network layer data structure that described employing formulates according to standard interface obtain compressing, and the data after the described compression are mainly sent to back-up system with the system bottom coffret by described;

Described second data identification module, when the data that are used for the network layer data structure formulated according to standard interface when described employing are the part of needs backed up data, after receiving main data of sending with system by back-up system bottom coffret, discern the data after the described compression and send to described decompression module, and preserve the described data that do not have compression; When perhaps the data of the network layer data structure of formulating according to standard interface when described employing are needs backed up data whole, receive main data of sending by back-up system bottom coffret after, discern the data after the described compression and send to described decompression module with system;

Described decompression module is used for the data after the described compression are decompressed, and preserves the data after decompressing.

8, system according to claim 7 is characterized in that,

Described compression module is the main compression function module that has with system itself; And/or

Described decompression module is the decompressing function module that back-up system itself has.

9, system according to claim 6 is characterized in that, described master is leading with system, back-up system on the WCDMA RNC with system, back-up system.

10, system according to claim 7 is characterized in that,

Described compression module is an ASN.1 codec functions module; And/or

Described decompression module is an ASN.1 codec functions module.

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